Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
chieu xanh » chieu sach, chieu sang, chieu tinh
nhung cong » dung cong, thong cong, hang cong
hieu manh » dieu hanh, hien hanh, hieu van
chinh cua » chinh ca, chinh sua, hinh cua
cua nhung » va nhung
cong luan » tong luan, cong tuan, dong luan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((hieu manh) OR (hieu nganh))) or (chieu xanh)) - hanh chinh cua nhung cong luan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hieu manh) OR (hieu nganh))) OR (chieu xanh)) - hanh chinh cua nhung cong luan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((hieu manh) OR (hieu nganh))) or (chieu xanh)) - hanh chinh cua nhung cong luan van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((((hieu manh) OR (hieu nganh))) or (chieu xanh)) - hanh chinh cua nhung cong luan van ban*.